>> reporter: in the end, the combination of mom's motivation to find deals and the kids' savvy with technology may be the best combination finding sales. in the end, mom, martha, crushed the teens. she got hundreds off, where they got small dollars off. but i think this just comes down to a motivation issue. they got distracted. they were using their phones to facebook what they bought. yeah. mom, she wanted that deal and she found it. >> she got it. i love this. i didn't know much about this at all. now, i learned a lot, becky. i really did. >> a lot of takeaway. >> a lot of takeaway from that. >> thank you, becky. >> pleasure. >> all right. amy? >>> speaking of deals, 2013 is almost here. we have four perfect looks to ring in the new year in style. "lucky" magazine's lori bergamotto is here. $100 or less. >> there's still bargains to be had, amy. >> we begin with mary. mary's going to come on out. >> this dress is more of a vintage look. you see the tea length. very trendy for right now. we gave her a little thrift store clutch for $5. >> $5? >> go to thrift stores. and shoes from forever 21